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Several forms of nitrogen occur in wastewater.

Each form is often analyzed to determine the total nitrogen content of both influent and effluent samples in domestic and industrial wastewater's. These analysis assist waste generators in their determination of treatment efficiency and allow for the determination of impacts on receiving streams as effluent's are discharged.

The different forms of nitrogen and phosphorus are refereed to collectively as NUTRIENTS.

Nitrate (NO3), Nitrite (NO2), and Ammonia (NH3)

are considered inorganic forms of nitrogen and are analyzed separately in wastewater's to determine the total inorganic nitrogen.

Total Kjehldahl nitrogen (TKN)

is the combination of organically bound nitrogen and ammonia in wastewater. The organically bound nitrogen must be released from the organic matter by a process of digestion prior to analysis. This form of nitrogen is usually much higher on influent (untreated waste) samples then effluent samples. In most domestic wastewater facilities the biological activity breaks down the organic matter releasing and or consuming the nitrogen as energy in the process. Total nitrogen is the combination of organic nitrogen and inorganic nitrogen (NH3, NO3, NO2).

Sample Submission

Due to workload and facility requirements all wastewater samples must have prior approval. All samples must be submitted in approved containers and delivered to the laboratory at 7102 W Okanogan Pl Kennewick, WA. Inquires about sample analysis not listed are welcomed and will be accommodated whenever possible.

For more information and/or assistance, contact the Environmental Health Division at 460 4205 or the BFHD Laboratory at 460 4206.
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Benton Franklin Health District
7102 W Okanogan Pl
Kennewick WA
(509) 460 4200
412 W Clark
Pasco WA
(509) 547-9737

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